About this tool
Convert angular measurements across degrees, radians, gradians (0–400), full turns, and astronomical arcminutes/arcseconds.
Formula
value_to = value_from × (factor_from ÷ factor_to), with factors in radians.
Worked example
90° × (π/180 ÷ 1) = π/2 ≈ 1.5708 rad
Notes
A full circle is 360° = 2π rad = 400 gon = 1 turn.